Tohoku University Technology: Communication system, signal processor, signal processing program, and communication method: T21-133
Backscatter signal processing and sidelobe suppression
In the Internet of things (IoT) society, all kinds of objects will be connected to network such as internet. For an example of a factory, an access point equipped with multiple antenna elements installed at the base of a machine tool can track a sensor node on an object attached at the extremity of machine tool arm moving at relatively high speed. A known method of capturing the position of the sensor node is to use the backscatter wave of the signal transmitted by the access point. However, there is a problem that sidelobe is generated near the modulation frequency signal of backscatter. This invention is able to suppress the sidelobe generated near the backscatter modulation frequency signal that appears in the demodulated signal spectrum. The access point is characterized by demodulating the modulation signal by multiplying the received modulation signal with the transmitted signal. This enables suppression of sidelobe generated near the modulation frequency of the backscatter in the demodulated signal spectrum.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of June 1, 2025): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University
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